ChordLuma: Chords, Key & BPM
Listen, explore, practice
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Explore the chords, key, and tempo in your music. Listen live or import a file, review the results, and practice at your pace—all with on-device analysis.
Hear the rhythm. Explore the harmony.
ChordLuma helps you estimate chords, musical key, and tempo from nearby music or an imported file. Follow live estimates, explore a saved chord timeline, and practice with your own music—all with audio analysis on your iPhone or iPad.
LISTEN LIVE
Start listening to see tempo, beat-grid status, global key, and the current chord. A sound-reactive display shows incoming activity while the analyzer gathers evidence. Explore recent chord estimates in the Live Harmony Map, with clear learning, held, and no-chord states.
IMPORT AND EXPLORE
Choose compatible, unprotected audio or video through Files. Review tempo and key estimates, a chord timeline, and the Harmony Map. Without Premium, imports cover up to the first 60 seconds and the library holds up to 5 analyses. Completed analyses are saved locally. Playback, seeking, library search and sorting are included.
PREMIUM: MAKE THE RESULTS YOURS
Correct BPM or key and edit chord intervals without overwriting the detected chord timeline. Split or merge supported intervals and reset to the detected version.
PREMIUM: PRACTICE AT YOUR PACE
Link the original file for playback, seeking, and A–B looping. Adjust playback speed from 50% to 125% while preserving pitch. An optional practice click follows the saved detected beats when a playable beat grid is available.
PREMIUM: GUITAR HELP, WHEN YOU NEED IT
Explore standard fingerings for supported chords, capo starting points, and display-only transposition. Live guitar tools use fresh estimates; saved Results let you inspect the selected chord. Transpose and capo display controls do not pitch-shift the original audio.
PREMIUM: SHARE A CHORD CHART
Export derived results as timed TXT, ChordPro, or PDF. Manual corrections are identified, and source audio is never included in the chart.
CHOOSE YOUR PREMIUM ACCESS
Premium also unlocks full-file analysis and unlimited saved analyses. Choose Lifetime Premium as a one-time purchase, or Weekly Premium as an auto-renewing subscription. Both unlock the same Premium tools. Weekly subscriptions renew automatically unless cancelled in your Apple Account subscription settings. Payment is charged to your Apple Account after confirmation. Buying Lifetime does not cancel an existing subscription. Saved results remain readable when a subscription ends.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://whitewhalesoft.com/APPS/ChordAnalyzer/Privacy.html
PRIVATE BY DESIGN
No account, ads, tracking, or cloud audio analysis. Live listening does not save a recording. Imported originals are not copied into the analysis library; a removable source link lets you reconnect for playback. Delete saved analyses without deleting your original music.
KNOW THE LIMITS
ChordLuma is a learning and practice aid, not a perfect transcription service. It estimates major, minor, and dominant-seventh chords, plus no-chord passages, and works best with clear tonal music and a reasonably steady tempo. Noise, dense mixes, complex harmony, and related major/minor keys can cause uncertain or incorrect results. Estimates may take several seconds to settle, and chord changes can lag. Review and correct results when needed.
Live listening requires microphone permission. File support depends on your device's decoder; DRM-protected and streaming-service tracks are not supported. The included sample has no playable source audio. Requires iOS or iPadOS 18 or later. Interface: English and Simplified Chinese. Exported charts remain in English.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Now available in Simplified Chinese, with a refreshed Premium screen and clearer purchase options.
Introducing optional Premium: full-file imports, unlimited saved analyses, editing, advanced practice, guitar tools and chart export. Choose a one-time Lifetime purchase or a Weekly subscription. Live recognition remains included; imports without Premium cover up to 60 seconds, with up to 5 saved analyses. Existing saved results are retained.
Improved key estimation for imported music, helping distinguish closely related major and minor keys when the chord progression provides clear evidence.
Analyze an original file again to use the improvement. Your existing saved results and manual corrections remain unchanged.
The developer, 小健 赵, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 小健 赵
- Size
- 6.6 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Weekly Premium $1.99
- Lifetime Premium $7.99
- Copyright
- © 2026, XIAOJIAN ZHAO